Left-handed and right-handed: scientists have found out when a person chooses the "leading" hand
Left-handed and right-handed: scientists have found out when a person chooses the "leading" hand
Anonim

Lefties make up about 10% of the world's population. The nature of this phenomenon is not completely clear, and fresh research sheds light on it!

Left-handed and right-handed: scientists have found out when a person chooses the "leading" hand

For many centuries, people refused to acknowledge the existence of left-handedness, and left-handed people were considered the incarnation of the devil or sick. Which, of course, is not the case. Nowadays, they have ceased to be retrained on "how to do it right."

The study, carried out by scientists from Holland, Great Britain and China, included observing the development of fetuses in the womb. The result was interesting: “The motor cortex of the brain sends signals to the spinal cord, which commands the arms and legs. But when studying the development of a child before birth, it became clear that the decision to use the right or left hand is made before the cerebral cortex connects to the spinal cord."

This means that left-handedness (or ambidextrism, that is, the use of both hands) is due to genetic and environmental factors, and not to development or upbringing after birth. In the coming years, monitoring of the choice of the leading hand in the early stages of intrauterine development will continue.

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